Question

The element present below hydrogen in electrochemical series is:

• A. $Mg$
• B. $Hg$
• C. $Pb$
• D. $Sn$

Answer 1

The correct option is B $Hg$

Hg is present below hydrogen in electrochemical series.
The substances, which are stronger reducing agents than hydrogen are placed above hydrogen in the series and have negative values of standard reduction potentials. All those substances which have positive values of reduction potentials and placed below hydrogen in the series are weaker reducing agents than hydrogen.